Heat a grill pan on high. Brush the peaches with a little olive oil and place cut side down on the grill. Leave on the grill for a few minutes, but be careful not to burn them! Grill the haloumi slices on both sides until just soft. Arrange the rocket on a platter, scatter with slices of the grilled peaches and haloumi. Sprinkle with lemon thyme and toasted pine nuts and finish off by a generous drizzle of pomegranate balsamic. Serve as a light meal.